Add Two Numbers Represented as Strings
Add two non-negative integers represented as strings.
Input: num1 = "456", num2 = "77"
Output: "533"
Explanation: Performs character-by-character addition from right to left, carrying the 1 from 6+7=13 to the next decimal place.

Question

Add two non-negative integers represented as strings.

Input: num1 = "456", num2 = "77"

Output: "533"

Explanation: Performs character-by-character addition from right to left, carrying the 1 from 6+7=13 to the next decimal place.